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3 years ago

What is a difference between a rectangular prism and a cube?

Mathematics

2 answers:

seropon [69]3 years ago

4 0

Either the 1st or the 4th one

Alexeev081 [22]3 years ago

4 0

A cube has six congruent squares (last one)

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The number of hours (H) that a candle will burn increases when the length of the candle (L) increases. Write the correct equatio

jeka94

$\bf \qquad \qquad \textit{direct proportional variation}\\\\
\textit{\underline{y} varies directly with \underline{x}}\qquad \qquad y=kx\impliedby 
\begin{array}{llll}
k=constant\ of\\
\qquad variation
\end{array}\\\\
-------------------------------\\\\
%. Length Hours 15 3 20 4
\begin{array}{ccllll}
length&hours\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
15&3\\
20&4
\end{array}\\\\
-------------------------------\\\\$

$\bf \textit{H increases as L increases}\implies H=kL
\\\\\\
\textit{from the table above, we also know that }
\begin{cases}
L=15\\
H=3
\end{cases}
\\\\\\
3=k15\implies \cfrac{3}{15}=k\implies \cfrac{1}{5}=k\quad thus\quad \boxed{H=\cfrac{1}{5}L}
\\\\\\
\textit{now, what is H when L = 2}\qquad H=\cfrac{1}{5}\implies \cdot 2$

4 0

3 years ago

Read 2 more answers

Choose the congruence theorem that you would use to prove the triangles congruent.

cupoosta [38]

SAS as they have two sides that are the same on the other triangle and the angle between the sides is the same

6 0

3 years ago

PRACTICE ANOTHER Calculate the standard deviation σ of X for the probability distribution. (Round your answer to two decimal pla

nataly862011 [7]

Complete Question

The complete question is shown on the first uploaded image

Answer:

The standard deviation is $\sigma = 1.17$

Step-by-step explanation:

From the question we are told that

The data is

x 1 2 3 4

P(X = x) 0.2 0.2 0.2 0.4

Generally the standard deviation is mathematically represented as

$\sigma = \sqrt{ \sum x^2 P(x) - (\sum x P(x))^2 }$

Here $x^2 = 1^2 \ \ 2^2 \ \ 3 ^2 \ \ 4^2$

=> $x^2 = 1 \ \ 4 \ \ 9\ 16 \$

$\sum x^2 * P(x) = (1 * 0.2) + (4 * 0.2 ) + (9 * 0.2 ) + (16 * 0.2 )$

$\sum x^2 * P(x) = 9.4$

$\sum x P(x) = (1 *0.2) + (2*0.2) + (3 * 0.2) + (4 * 0.2)$

$\sum x P(x) = 2.8$

$\sigma = \sqrt{ 9.2 - (2.8)^2 }$

$\sigma = 1.17$

6 0

3 years ago

Together Dean and Angelo have 185 stamps. Dean's collection has 57 more stamps than Angelo's collection. How many stamps does An

marta [7]

First you would do 185-57 which gets you 128 next divide it by 2 which gets you 64 so Angelo has 64 and Dean has 121 stamps and together they have a total of 185

7 0

3 years ago

Jake is making bracelets to give to his sisters. He uses 4 rainbow charms and 8 white star charms for his younger sister's brace

kolbaska11 [484]

Answer: Yes.

Step-by-step explanation: 4:8 simplifies to 1:2, since he used half as many rainbow charms as he did white stars. 5:10 also simplifies to 1:2. If they both have half as many rainbow charms as white, then both of his sister’s bracelets keep the same ratio.

3 0

3 years ago